General Information


  • Dual ESS SABRE ES9219C DAC chips and a dedicated high-precision clock crystal oscillator module, which lowers jitter significantly.
  • Mode switch between low and high gain, dedicated volume controls on the unit.
  • DT03 supports PCM up to 32bit/384Khz and DSD up to 256.
  • 3.5 and 4.4 Dual Output Interfaces: High Power Driving Output, Remarkable Sound
  • Type-C Interface with Interchangeable Cable Design, Plug-and-Play and no need for special drivers
  • CNC milled aluminum shell
  • RGB LED sampling rate indicator
  • A 12.5cm and an 80cm Type-C to Type-C signal transmission cable and a Type-C to standard USB adapter is included.
  • A black faux leather case comes standard as well to protect the surface from scratches.








Latest reviews

mars chan

New Head-Fier
Letshuoer DT03 review
Pros: .
- sound quality
- sound quality
- sound quality; yes, I said it three times for emphasis.
- volume control
- gain switch
- value for money
Cons: .
- I wish the edges of the body were rounded.
- I wish the light indicator could be turned off.
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Letshuoer DT03 review

T.L.D.R. I don't know what magic they did to the Letshuoer DT03, but it sounds better than all my other dongle DACs, making it my reference dongle DAC in the $100 price range.

I would like to thank Letshuoer Audio for sending the DT03 dongle DAC amp for a review as part of a review tour with reviewers near my area. I'm so grateful for this, and when the tour is over, the DT03 will be raffled off among the participants.

My unboxing experience is very positive; the packaging is elegant and classy (see photos); it includes a long and a short USB-C cable; a type-A to type-C adapter; a manual; and the dongle DAC itself.

I didn't know the price when I opened it; I was thinking while doing so that this could cost above 130 dollars based on how the packaging looks; thankfully, it only cost 89 US dollars—not cheap, considering the economy, but a bargain, considering the sound quality, as I will touch on later.

The Letshuoer DT03 has no issues driving difficult-to-drive sets with low impedance, such as the TangZu x HBB Xuan NV and the Hidizs MP145. The bass remains very controlled even at high volumes, and it drives them very well.

Sound quality:

This is very neutral and has the flattest subjective frequency response I've heard so far. This blows away all my other dongle DACs in terms of sound quality and is now my new reference DAC, replacing the Hidizs S9 Pro Plus Martha. It sounds more like a digital audio player DAP than a dongle DAC. Yes, this can be used to replace many low- to mid-priced DAPs on the market.

Sound signature and tonality:

It has near zero sound signature; it is so transparent that I don't detect any sound coloration when listening at reasonable volume levels. It is tonally flat but very musical; it does not favor any particular audio frequency range like most dongle DACs do. This is the aspect of the DT03 that impresses me the most.

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The bass is neutral, but when the music demands it, it is presented in a big and ballsy way, unlike most dongle DACs, which sound thin and small when presenting the bass, making it obvious to me that I'm listening to a dongle and not a DAP.


It is very neutral and colorless, with natural and vibrant energy that makes the sound engaging and musical.


Neutral and full of details, I hear no harshness like most dongle DACs have, making this sound more like a DAP than a DAC.

Compared to Hidizs S9 Pro Plus Martha:

The S9 Pro Plus was my previous reference dongle DAC in the 100-dollar price range; it is now supplanted by the DT03 because the DT003 is more neutral, accurate, and smooth, while the S9 Pro Plus has a slight enhancement in the upper midrange and lower treble regions, a lesser bass impact, and a very slightly lower resolution in the treble.

Compared to Moondrop Moonriver 2:

The Moonriver 2 has tighter and dyer bass, a very flat subjective frequency response, and is tonally accurate. But compared to the DT03, it sounds less musical due to its dry presentation, and it also has a smaller soundstage.

Compared to the Moondrop Dawn Pro:

The Dawn Pro is slightly warmer, about the same soundstage size, and has slightly less resolution in the treble.

Compared to the Kiwi Ears Allegro:

The Allegro also has a very flat subjective frequency response; however, the DT03 simply has a slightly higher resolution, a bigger soundstage, a bigger bass presentation, and a smoother sound delivery. They are not far off in sound quality, but the DT03 sounds slightly more refined.

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- sound quality
- sound quality
- sound quality; yes, I said it three times for emphasis.
- volume control
- gain switch
- value for money


- I wish the edges of the body were rounded.
- I wish the light indicator could be turned off.

All the differences in sound quality between the dongle DACs I compared here are really small; they might not even be discernible to some people, even long-time music listeners, so please keep that in mind. You can never go wrong with all the DACs mentioned here; they all sound good in reality, but for reference purposes, I tend to favor the one that is the most neutral and transparent.

I haven't heard all the dongle DACs on the market, so you may take this review with a grain of salt, but on a personal level, I'm very confident that the Letshuoer DT03 is one of the best neutral and transparent-sounding dongle DACs available in the market, regardless of price, and I wholeheartedly highly recommend it.

Happy Listening! Cheers!

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David Haworth
Perfect review and I concur. It makes my R3 Dap sound much better. I put it head to head with the R4 Dap and I slightly favoured the DT03 sound.
mars chan
just got this today... compared to my $9 realtek dongle ( apple dongle equivalent) this produce a bigger stage and more detail with natural transient in voices. no harshness, no colouration, no sibilance like the realtek dongle or the motherboard audio.


500+ Head-Fier
LETSHUOER DT03: First Attempt, Pretty Well-executed
Pros: ● Firm, solid and seamless construction of its overall frame structure while maintaining a lightweight.
● Well-implementation of its composite materials as they are quite sturdy.
● While it has an unusual shell design, it still offers an ergonomic fitting
● Pretty well-accessorised for a headphone dongle along with its asking price.
● A faux leather case for the dongle itself for added more protection.
● Volume key buttons
● Manual gain switch
● That elongated LED light looks really attractive.
● Surprisingly, it has good thermal control management.
● A neutral sound profile
● Clean and quite delineating on delivering the sound quality from its source.
● Can decode/encode up to 32-bit/384kHz and up to DSD256 in DSD format.
Cons: ● Certainly it doesn't have that high power output like some dongles that I've tried, therefore is not a class-leading one in that category.
● I doubt that this device is able to properly drive some cans that have a high impedance rating.
● That LED lighting might be bothersome to some users.

LETSHUOER became one of the staple names in a portable audio community as it really delivers some of the recognisable products in the past few years. As this audio company releases some of the well-regarded IEM models around, they decided to create a new product line-up, this time with their first ever USB headphone DAC/Amplifier dongle.


This is LETSHUOER DT03, this device has a compact size and it has two types of audio output on its interface that make this one truly portable and relatively versatile to use. This dongle will truly elevate the sound quality on some gadgets like smartphones, tablets, laptops and PCs to redefine high-fidelity sound experience on such a light portable device could deliver.



On its overall layout, its frame is made of CNC-milled aluminium alloy that underwent an anodising process to achieve that matte-finish surface with its parallel cross section part panels has a polycarbonate thermoplastic that takes an oval profile on both ends. It has a rather long RGB LED indicator to determine a type of digital audio format and its sampling rate. On one of its side panels that were troughed, there's a manual gain mode switch along with volume control keys in a circular form and it seems that they are quite tactual and responsive to press them.



On its connectivity port used to communicate with other devices via plug and play, it was outfitted with type-C port as this type of USB port is the current standard to all devices that augmented its compatibility in both software and hardware. Meanwhile, on the other side, its interface has dual audio output of different types, a standard 3.5mm and a balanced 4.4mm.


3.5mm SINGLE ENDED78mW at 32Ω119dB
4.4mm BALANCED195mW32Ω119dB


On its internal part, it has an ESS DAC chip, a dual ES9219C as its main core to decode/encode some digital audio signal into analogue output. This particular DAC/Amp IC is a proven one as it powered up some devices that I'm acquainted with like the LG V60, HIDIZS XO and HIBY R3 MK.II and I know its power efficiency while delivering a clear and detailed sound quality at reasonable power output. The ES9219C is a hi-fi DAC in a quad array that is capable of processing up to 32-bit with a highly competent 2-channel stereo audio SABRE Headphone Amp that can support up to 2 Vrms of power output with an option of having an analogue gain control to reduces any unnecessary output noise floor and distortion that might be unpleasant to our listening session. Aside from the chip and its vaunted headphone amp, it also has its own precise clock quartz oscillator to lessen jittering between the USB interfaces. This DAC can even faithfully reproduce the audio quality of a track from its original recording and it can encode and decode up to 32bit/384kHz in PCM format and up to DSD256 in DSD format. The RGB LED Indicator will show sampling rate status via colour-coding.


88.2 kHzGREEN
176.4 kHzBLUE
192 kHzBLUE
352.8 kHzRED
384 kHzRED

The product packaging of LETSHUOER DT03 is quite well-accessorised for a headphone DAC/Amp dongle as LETSHUOER wants this device to be as versatile to be used as possible.


Here are following contents inside of DT03's packaging box:

  • LETSHUOER DT03 Headphone DAC/Amplifier Dongle
  • A black coloured PU leatherette case
  • A short 80cm type-C to type-C cable
  • A bit long 12.5cm type-C to type-C cable
  • Paperwork like instruction manuals, Q.C. stub and warranty card.


As for connectivity on both hardware and software, it supports a miscellany of modern devices like smartphones, tablets, laptops, PCs and even DAPs with a USB audio decoding support. In regards to software support, this device is compatible with all known OSes in either mobile or desktop formats.


It supports mobile OS like Android, iOS and Harmony OS while on desktop OS, it supports Windows, MacOS and Linux.

Since I'm more of an Android user, I can more accommodating and freely share on what particular apps that supports USB audio decoding for this device like HIBY MUSIC App, UAPP (USB Audio Player Pro), Onkyo HF and Neutron app.


On how this device delivers its output, it gives a neutral sound profile with a little bit of added treble emphasis but still remains to sound uncoloured as possible.




I've tested all my sets with different sound profiles, from the boomy and authoritative ones down to the tight and incisive bass response of some reference-neutral IEMs, I don't hear any overemphasis on a bass frequency as it retains its bass texture quality and quantity.

I clearly perceived those rumbling and reverberating sub bass presence generated by selected instruments like synthesisers, drum machines, octobasses, and low octave bass guitars and double basses. It also appears that it delivers an ample mid bass texture to some clef bass instruments and deep male vocals while maintaining a clean, well-segregated and good control within its own frequency region.


THE S08 retains a clean, neutral and transparent midrange presentation, without too much embellishments on instruments and vocals’ tone and timbre. It really delivers an excellent detail, clarity and articulation in this particular frequency range.

Male vocals have a sufficient texture and depth while female vocals will sound more clean and lively. Strings and woodwind instruments will have its vibrant, crisp and silvery presentation while brasses and percussion have those sound characteristics like brassy, full, resonant and precise on its respective tonal colour.


As I mentioned it while ago regarding its tonal delivery, there's a discernible minimal emphasis on some parts on the treble section but LETSHOUER execute it in a very sensible manner in which I really think its a very appropriate one as it conveys an elucidate presentation in terms definition and clarity on some vocals and attack of percussives and rhythm instruments in clear and well-delineated manner.

This device is also capable to mark out more definition on the brilliance region like air, sparkle and substantial harmonics.


The DAC/Amp dongle can give an above-average to wide sound/speaker stage depending on the technical performance of the paired set that was used for decoding and amplification. It also projects a well-layered soundscape and excellent stereo imaging presentation in which I can pinpoint the exact placement of certain instruments and vocals in which I tried to pair it with technically proficient sets.

This device is capable of rendering a remarkable resolution aspect in both macro-dynamics and micro-dynamics as it shows a solid note compression on the former while it is capable of projecting a substantial amount of micro-details and nuances from a clean black sonic canvas.

As for power output delivery, while this set isn't a champ in terms of sheer amplification output but it is rather on a moderate level of power output delivery as it is capable of driving some IEMs with planar magnetic driver or ceramic dynamic driver and other cans that require some more power output to have that optimal sound quality. Surprisingly, it has a good thermal management as it does not have a heat build-up a lot in a long usage but rather on a warmer side of temperature.



  • Its frame structure is made of aluminium alloy that was sandblasted to achieve that texture with carbon-fibre cover on its panels.
  • It has a RGB LED light for sampling rate although its placement is a bit misaligned.
  • It has a short 8-core type-C to type-C cable.
  • Like the DT03, it also has volume key buttons and manual gain switch but this device has a play/pause button.
  • Instead of implementing ESS, EPZ opted to use a Cirrus Logic DAC chip, CS43131 which is also a power efficient on it also capable of delivering a 2Vrms and capable of decoding of digital audio format up to 32-bit/384kHz on PCM and up to DSD256 on DSD format.
  • It delivers a warmish-neutral sound profile.

  • It has a solidly built structure while having a lightweight design as it is also made of metal alloy that underwent via CNC-milling process and sandblasting to achieve the colour and texture.
  • It also has a volume key button but it doesn't have a manual gain mode but it has more power output in both 3.5mm and 4.4mm jacks on paper.
  • Another dongle that uses a Cirrus Logic CS43131 which is very reliable and power efficient that it can process up to 32-bit/384kHz on PCM and DSD256 on DSD digital audio format.
  • Another warmish-neutral sounding device like most Cirrus Logic devices that I've tested.

  • It has solid aluminium alloy that underwent an anodising process to have a brush surface with an overall aesthetic of a vintage video game console controller.
  • It also has volume keys but it doesn't have manual gain mode switches.
  • In terms of power output, this device is capable enough to drive some power-hungry IEMs with either ceramic dynamic drivers or planar magnetic drivers.
  • It uses a desktop-grade ESS DAC, the ES9028Q2M which has similar decoding/encoding capability of its mobile counterpart, ES9219C.
  • It has a balanced-neutral sound profile but it has less emphasis on the treble region compared to the DT03.

To sum up my review on this device, LETSHUOER seems to deliver a capable headphone DAC/Amplifier dongle that can be used in both mobile and desktop either for casual listening and professional use. This set is very competent on projecting a neutral sound profile with some less colouration on its timbre and tonality while having a good technical capabilities that analytical types will somehow enjoy its overall technical performance. For sure that it doesn't have that class-leading power output that probably will not have a satisfactory optimal sonic performance on some power-hungry cans but on most IEMs and earbuds, this one is competent enough to drive them.

LETSHUOER DT03 is now available on LETSHUOER's own official store on their website. You can click the unaffiliated link below.


For more LETSHUOER product reviews, just check out the following highlighted products:












Output Power78mW(SE); 198mW(BAL)
Input ModeUSB Type C
Output Mode3.5MM + 4.4MM Headphone
Frequency Range20Hz-40kHz (±0.5dB)
THD0.0006%(32Ω SE)
Sampling Rate32bit/384kHz
DAC Chip SetESS ES9219C (2x)
MaterialAluminium Alloy
Compatible DevicesMac\Windos\IOS\Android

TESTING TRACKS: ( * = 16-bit FLAC, ** = 24-bit FLAC, *'* = MQA, '*' = DSD, *'= .WAV)

Alison Krauss -When You Say Nothing At All *
Jade Wiedlin - Blue Kiss**
Led Zeppelin - When The Levee Breaks **
Mountain - Mississippi Queen *
Queen - Killer Queen **
Guns N' Roses - Patience *'*
Eric Clapton - Tears in Heaven '*'
Sergio Mendes- Never Gonna Let You Go '*'
Pearl Jam - Daughter **
Roselia - Hidamari Rhodonite *
Assassin - Fight (To Stop The Tyranny)*
Celtic Frost- Visual Aggression *
New Order - Blue Monday *
The Corrs- What Can I do (unplugged version) *
Jimi Hendrix Experience - Voodoo Child *
The Madness- Buggy Trousers *
Metallica - Motorbreath **
Mariah Carey- Always Be My Baby *
Destiny's Child - Say My Name *
Malice Mizer- Au Revoir *
Mozart - Lacrimosa *
New York Philharmonic Orchestra - Dvorak- Symphony 9 " From the New World." *
Eva Cassidy - Fields of Gold (Sting cover)*
Michael Jackson - Give In To Me *
Exciter - Violence and Force *
Diana Krall - Stop This World **
Debbie Gibson - Foolish Beat *'*
The Sisters of Mercy – Lucretia My Reflection**
Suzanne Vega – Luka **
Lauren Christy – Steep *
Ottoman Mehter - Hucum Marsi *
Diana Damrau - Mozart: Die Zauberflöte*


I am not affiliated to LETSHUOER nor receive monetary incentives and financial gains as they provide me a review unit for an exchange of factual and sincere feedback from yours truly.

Once again, I would like to send my gratitude to MS. BETTY of LETSHUOER for providing this review unit. I truly appreciate their generosity and trust towards me and other reviewers.

Last edited:
David Haworth
I'm one of those analytical types and I A/B'd the DT03 with the New Hiby R4. It was close but I prefered the sound from the dongle to the Hiby DAP!


500+ Head-Fier
Pros: + Very lightweight

+ Neutral/transparent sound

+ Does not add any color to the stock tuning

+ Plenty of power

+ Gain switch

+ Accessories
Cons: - No independent volume control

- Not the best build quality/premium feel

- Light on features

thaslaya's star rating system:
☆☆☆☆☆ - Fantastic!
☆☆☆☆ - Recommended
☆☆☆ - Sound for thee, not for me
☆☆ - Can't see the appeal
☆ - Product is a failure

This product was sent to me by Letshuoer in exchange for my honest and impartial review. I recieve no compensation and all thoughts and opinions are my own. Non affiliate link here:

Gear used:
● Samsung Galaxy s22 Ultra
● Samsung dongle
● Hiby FC4
● KiwiEars Allegro
● Various iems

● Listening was done through Amazon Music HD or Ultra HD.

Letshuoer is a brand known to most audiophiles who have spent a bit of time in this hobby. The company has been consistently releasing a wide range of quality products, including iems, cables, and DAC/amps. A few recent notable releases include the Cadenza4 and S15, which have been well-received by audio community. This year, they celebrate their eighth anniversary and are marking the occasion with some new releases. The dt03 is their latest dongle DAC/amp, but not their first. However, it is the company’s only offering so far with a removable cable. It’s currently available on Letshuoer’s website for $89. Let's see what the dt03 has to offer.

Build, design and features:
The unboxing experience is really nice. The unit itself is small but it comes in a fairly large package. Within the box are 2 smaller boxes, lifting the larger one reveals the dt03 nestled into foam. These boxes hold the manual and paperwork, an 80 cm and 12 cm cable, and a protective case. This is the first DAC/amp that includes both a short and long cable (there's also a USB-C to USB-A adapter). The longer cable is a welcome inclusion, especially for desktop use. The dt03 utilizes dual ES9219C DAC chips and it sports a sleek, handsome design with rounded edges. It has a matte black finish and a long LED indicator light on its face. Although the packaging and design are done well, the build quality of the dt03 itself leaves a bit to be desired. It's made of an aluminum alloy but has somewhat of a cheap feeling in hand. It's hollow and lightweight, which could be a pro for some, but I personally prefer a heavier, sturdier build. The size of the unit is about average and is comparable to others on the market. One end features both 3.5 mm and 4.4 mm inputs, and the other features the USB-C port for source connection. The gain switch and volume adjustment controls are both located on the same side of the unit. Unfortunately, the volume buttons are tied to the source and lack independent volume control. This is not ideal for me, as I prefer smaller steps to better tailor the volume level to my needs. The LED light on the front displays various colors to indicate the sampling rate (green for ≤96 kHz, blue for 176.4 kHz or 192 kHz, red for ≥352.8 kHz, and yellow for DSD). I really like the light being a key feature in the design, and it sets the dt03 apart from some of its competitors. The inclusion of a leather case is a welcome feature to protect the body from scratches and dings. It's not a very premium-feeling case, but at least it's something, and I do appreciate it. There's not much to talk about in terms of features. The dt03 doesn't have a companion app or any digital filters, so what you see hear is what you get. Sometimes, simple can be better.

Power consumption:
● The dt03 boasts an output power of 78mW @32ohms (single-ended) and 195mW @ 32ohms (balanced). To test the dt03's power consumption I ran a short trial. With my devices in airplane mode, I let my library play on a medium high volume with high gain enabled, while making sure to limit any unnecessary interaction with the screen. Here is the battery drain results after 1 hour:

18% on LGV30+ through 4.4 and 13% through 3.5.

6% on Galaxy S22 Ultra through 4.4 and 5% through 3.5.

These results were quite impressive to me. The dt03 appears to draw less power from my sources than the other DAC/amps I've reviewed thus far. Lower power requirements mean more listening time!

Sample track breakdown:
These comparisons were made using the dt03 against the Samsung dongle.

● "Too Sweet" - Hozier
The bass in the intro is fuller and more textured and continues to have more weight throughout the track. The snare is slightly subdued but still present, just not as "in your face." The soundstage grows a bit deeper and wider. The dt03 injects a sweetness to the vocals and also shows better separation. Overall, it just sounds a little more mature and refined.

● "Dreams" - Fleetwood Mac
The first snare hit in the intro sounds a little less splashy and more crisp and accurate on the dt03. The bass guitar throughout the track has more rumble, reverberation, and presence. The vocal clarity and separation get a slight bump, allowing nuances to be heard more clearly.

● "Why Georgia" - John Mayer
With the dt03, I hear better vocal separation and a deeper soundstage. The guitar takes on better resolution and definition and sounds more natural. The drums that come in at 1:27 are more dynamic with better slam and texture, yet still not noticeably elevated or colored. The layering of instruments and vocals is taken up a notch, and I can pick up the background vocal harmony more clearly.

I would usually provide more track comparisons, but it became abundantly clear during my testing that the dt03 is very consistent and excels in presenting music in a tonally uncolored way. It has the same effect on my entire library, irrespective of genre. When compared to the Samsung dongle, the dt03 simply sounds more refined, mature, and dynamic. There is a noticeable improvement in resolution, separation, and a slight increase in the soundstage.

● KiwiEars Allegro - The Allegro presents a more colored sound than the dt03. It accentuates the mid bass slightly over the sub. There is noticeably more energy and air in the highs with an additional crisp and edge to the notes. The Allegro has a slightly reduced soundstage by comparison. While the dt03 includes better accessories, the build quality of the two is comparable, though the Allegro is slightly heavier and smaller in profile.

● Hiby FC4 - The FC4 is more colored and has an organic and analog sound signature, whereas the dt03 is neutral and natural. The FC4 adds a slight bit of warmth and can help smooth out any troublesome peaks. The bass on the FC4 is a little less punchy and dynamic, but it does offer slightly better separation. The build quality is superior, and the FC4 feels more solid and premium with better weight. They are fairly close in size, but the accessories are better on the dt03.

In conclusion:
When Letshuoer first contacted me regarding the dt03, I didnt have much expectations. I'm unfamiliar with their prior releases but the dt03 was a nice surprise and is a wonderful DAC/amp. I was quite impressed at the way it presents a tonally correct and uncolored sound. It's the most natural and neutral option I've tested to date. The dt03 preserves the stock sound of iems while also elevating the technical prowess and dynamics to the next level. There is plenty of power available here, and it had no trouble running everything I threw at it, but it also had the lowest battery drainage too. In truth, I can't say that this is my favorite DAC/amp since I personally prefer a more colored, warmer sound such as the Hiby FC4. However, I will definitely be using the dt03 in my reviews going forward due to it's proficiency in presenting a natural and tonality correct sound. It has become a staple in my audiophile arsenal. While its build quality leaves a bit to be desired and it's light on features, I still give the dt03 a strong recommendation, especially for those who want an uncolored, natural DAC/amp option without breaking the bank.
David Haworth
Excellent assessment. I think the DT03 punches well above it price point


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